MapleSim and Maple Used to Automate the Mooring of Two Ships - Maplesoft

Etude de cas :
MapleSim and Maple Used to Automate the Mooring of Two Ships

The mooring of ships to harbors, terminals and offshore structures is a common and essential procedure in most seafaring operations. Inadequate mooring can result in significant structural damage to the berthing vessel and moorings. Most mooring operations are still performed in the same manner as they were decades ago; they are dependent on heuristics, or in other words, the captain or mooring master’s experience. Unfortunately, the effects of global warming and climate change are altering the hydrodynamics of the sea, making manual mooring operations a very risky venture. However, MapleSim, the advanced system-level modeling and simulation tool from Maplesoft, and Maple, Maplesoft’s powerful computation tool, can be used to design a mechanism to control and automate a mooring system between two ships at sea.

The process entails the creation of a physical model of the two ships and mooring cables. A realistic model of the external environmental forces is developed. The results are used to simulate conditions at sea. Next an appropriate controller to stabilize the system is designed and tuned.

Developing a realistic model of the external forces is critical to the design of the controller. The use of MapleSim and Maple allows the designer to tune the controller, eliminate vibrations, and stabilize the tension in the line. With the initial control system complete, further improvements can be made to the disturbance model by including irregular waves from multiple directions, wind gusts, wave drift forces and the interaction effects from passing ships.

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